In all, the Nevada deposit contains about 400,000 metric tons of seemingly bacteria-produced sulfides
Since the lowest free energy state for magnesium is magnesium oxide, the magnesium arid magnesium sulfide
are constantly looking to react with something from which it can obtain oxygen.
In the eastern United States, the mining of high-sulfur bituminous coal is a prime source of AMD, while in the West the hard rock mining of copper, gold, silver, lead, zinc, and associated sulfide
minerals contributes a great deal.
Included is previously unavailable data on the production of dimethyl sulfide
by phytoplankton species, along with information on the emission of sulfur from the roots of trees, and an analysis of the role of marine and freshwater bodies in the sulfur cycle.
What makes these flaps unique is their 100-micrometer-thick coating of iron sulfide
, a biological armor that's made of mineral particles just 1 [micro]m in diameter.
While a portion of these oxides and sulfides
float to the surface of the molten iron in the treatment vessel.
Assessing Sulfur Turbidity Formation Following Chlorination of Hydrogen Sulfide
Wachtershauser and his colleagues showed that metal sulfides
can catalyze the formation of a so-called activated thioester from simple ingredients (SN: 1/9/99, p.
Analyses of ancient sulfide
minerals and the modern organisms that create sulfides
are giving scientists a better idea of what Earth's atmosphere and oceans may have been like billions of years ago.